Thanks to Jim Estill, I came across this outstanding post by Tim O'Rielly: Work On Stuff That Matters, First Principles.
As you read this post, you are reading the fourth re-write. At first I summarized Tim's post, adding my views. Then I tried expanding on it.
As I re-read and edited, I realized I was trying to polish something that didn't need polishing. Read Tim's post, it's important. Then figure out what matters to you and work on it!